Wall Systems

Cavity Wall: Stone Slab Veneer/Reinforced Concrete Block

Beautiful stone panels over a concrete block backup system create a sophisticated and long-lasting exterior for important buildings.

Single  Wythe: Stone Slab Veneer
Coping and bond beam Truss attachment to bulb 'T' and ladder-type reinforcement Wall ties at stone veneer Flashing at base of wall

Recommended Building Types

Benefits

Special Considerations

Definition and Assumptions

Backup: Lightweight plain gray concrete block (CMU), 8” x 8” x 16”

Reinforcement: #6 vertical reinforcement at 32” on center 9-gauge joint reinforcement at 16” o.c. (every other course)

Veneer: 2” thick limestone panels, honed finish. Face size: 24” wide, stack bond. Alternate 24” tall and 8” tall units

Cavity: 3 inch air space and 2” extruded polystyrene rigid insulation

Flashing: Base flashing and weeps

Veneer ties: Type 304 stainless steel double-split tail anchors

Joint finish: Backer rod and sealant at all joints

Regional Variations

Fire Rating (hours)

Ungrouted Assembly: 3 hrs

Fully grouted Assembly: 4 hrs

Sound Transmission class (dB)

Ungrouted: 53

Grouted 32”: 55

Fully grouted: 60

STC=(weight of wall)0.223x21.5

Wall Weight (lb/sq. ft.)

Ungrouted: 56 lb./sq. ft

Grouted 32”: 67 lb./sq. ft

Fully grouted: 100 lb/sq. ft

Energy Rating

R-value: 11.57 with 2” expanded polystyrene rigid insulation (See note)

Calculation:

Outside Air =0.17
2 inch limestone =0.30
Air Gap =0.97
2 inch Polystyrene =8.00
8 inch CMU 105 pcf, grouted at 32” o.c. =1.45
Interior Air =0.68
Total =11.57

R-value: 13.57 with 2” extruded polystyrene rigid insulation (See note)

Calculation:

Outside Air =0.17
2 inch limestone =0.30
Air Gap =0.97
2 inch Polystyrene =10.00
8 inch CMU 105 pcf, grouted at 32” o.c. =1.45
Interior Air =0.68
Total =13.57

Note: The type of rigid insulation you install affects the wall’s insulating capacity (the R-value). Polyisocyanurate insulation gives you 8.0 R per inch (12.0 R for 1.5" or R16 for 2"). Expanded polystyrene insulation is worth 4.0 R per inch (6.0 R for 1.5" or 8 R for 2"). Extruded polystyrene yields 5.0 R per inch (7.5 R for 1.5" or 10 R for 2"). Use either thicker insulation or more expensive polyisocyanurate to achieve a higher energy rating.

Green/LEED Rating

Design Tips

Construction Tips